《永恆深藍：海洋的呼喚》（英文名：Forever Blue: Call of the Ocean，日文名：フォーエバーブルー 海の呼び声）是由Arika開發、任天堂於2009年在Wii平台推出的海洋潛水模擬冒險遊戲，也是2007年《永恆深藍》（Forever Blue）的正統續作。以更豐富的劇情、更大的探索範圍與更多樣化的海洋生物為賣點，延續首作的水中寧靜氛圍與環境互動，帶給如夢似幻的海底冒險之旅。

故事圍繞身為潛水員的主角與夥伴Katherine Sunday，於南太平洋神秘海域展開探索之旅。當地有被遺忘的海底文明與神祕遺跡的存在。隨著劇情推進，會逐步探索海洋生物、古代遺跡、深海裂縫與沉船殘骸。儘管劇情節奏緩慢，但透過主角與夥伴之間的互動、遺跡中的壁畫與古文資料，逐步拼湊出一段關於海洋、信仰與探索精神的感人故事。

操作方面，充分利用Wii遙控器與Nunchuk的體感功能來模擬水中操作。透過搖桿控制潛水方向，並用Wii遙控器指向螢幕操作視角轉動與互動行為，如觸摸生物、拍照或掃描資料。遊戲中並無傳統的戰鬥系統，而是強調探索、觀察與學習。自由潛入多個海域，欣賞超過300種以上的海洋生物，從海豚、海龜、鯊魚到深海異形生物，並可在研究室中進行分類與紀錄，累積資料圖鑑。

特別值得一提的是新增的「訓練海豚系統」，與特定海豚建立情感連結，訓練牠們進行特技動作或協助探索深處水域。還有潛水攝影、寶藏尋找與遺跡解謎等多樣玩法，讓水下探險不再只是觀光，更充滿目標與發現。支持單機與Wi-Fi多人模式，可以與其他玩家一同潛水，分享水下拍攝的照片，增加社群互動樂趣。

在市場評價方面，於日本與歐美地區皆獲得一定程度的好評。日本遊戲媒體《Famitsu》給出33/40分，認為在視覺與音效表現上極具沉浸感，營造出悠閒且富教育意義的水中世界，適合喜歡慢節奏遊戲的玩家。評論者尤其稱讚海洋生物的建模與動畫自然生動，能令人產生真實的潛水感受。然而也指出本作缺乏緊張刺激的遊戲元素，對動作遊戲愛好者來說可能顯得過於平淡。

在歐美地區如IGN與GameSpot的評價亦偏向正面。IGN表示這款作品是「一場令人心靈平靜的體驗」，並給予8.0分，稱讚其優美的水下視覺、真實的聲音設計以及豐富的生物圖鑑內容。GameSpot則給予7.5分，認為這是具啟發性的休閒遊戲，但也提到遊戲缺乏足夠的挑戰與目標導向，容易讓某些玩家感到無聊。

總結而言，這是風格獨具的水下探索模擬遊戲，以悠緩的節奏與寫實的海洋呈現，帶領玩家深入海洋的寧靜與神秘。對於喜歡海洋、自然、生態或希望在遊戲中獲得放鬆體驗的玩家而言，無疑是值得嘗試的潛水之旅。

Forever Blue: Call of the Ocean (Japanese title: フォーエバーブルー 海の呼び声) is an underwater diving simulation and adventure game developed by Arika and published by Nintendo in 2009 for the Wii. It serves as the direct sequel to the 2007 title Forever Blue (also known as Endless Ocean in the West), building on the tranquil underwater atmosphere of the original while offering a richer storyline, wider exploration areas, and a more diverse array of marine life. The game provides a dreamlike journey beneath the waves, emphasizing interaction with the environment and a deep sense of immersion.

The story centers on a professional diver and their partner, Katherine Sunday, as they embark on an expedition into a mysterious region of the South Pacific Ocean. This uncharted territory is believed to hold remnants of a forgotten underwater civilization and ancient ruins. As the narrative unfolds, players gradually explore not only the diverse marine wildlife but also deep-sea trenches, sunken ships, and ruins containing ancient murals and texts. While the plot moves at a slow pace, it gently weaves a touching story about the ocean, spiritual beliefs, and the human drive to explore, primarily conveyed through interactions between characters and discoveries made in the deep.

The game utilizes the Wii Remote and Nunchuk’s motion-sensing capabilities to simulate underwater movement. The analog stick controls the diver’s direction, while the Wii Remote is used to point, rotate the camera, and perform interactive actions such as touching sea creatures, taking photos, or scanning data. Unlike traditional games, Forever Blue: Call of the Ocean lacks a combat system and instead emphasizes exploration, observation, and learning. Players can freely dive into multiple oceanic zones, encountering over 300 species of marine life—ranging from dolphins, sea turtles, and sharks to bizarre deep-sea creatures—and catalog them in a detailed in-game encyclopedia.

One notable new feature is the Dolphin Training System, which allows players to bond with specific dolphins, train them in performing tricks, and even enlist their help in exploring deeper or harder-to-reach areas. The game also includes diving photography, treasure hunting, and ruin puzzles, making the underwater adventure more than just sightseeing; it becomes a meaningful exploration filled with goals and discoveries. The game supports both single-player and Wi-Fi multiplayer modes, allowing players to dive together and share photos, adding a social element to the experience.

In terms of reception, the game received a generally positive response in both Japan and Western markets. Japan’s Famitsu magazine awarded it 33 out of 40, praising its immersive visuals and sound design, which create a calming, educational experience ideal for players who prefer slow-paced gameplay. Reviewers particularly appreciated the natural and lifelike animations of marine creatures, which contributed to the realistic diving sensation. However, some criticism was directed at the game’s lack of intense or thrilling gameplay elements, which may make it feel too subdued for action-focused gamers.

In Western markets, reviews were similarly favorable. IGN described it as "a spiritually calming experience," giving it an 8.0 rating and commending its beautiful underwater visuals, authentic soundscape, and extensive marine life database. GameSpot gave it a 7.5, calling it an inspirational and relaxing casual title, though they noted the game might lack enough challenge or goal-driven progression to maintain the interest of some players over time.

In conclusion, Forever Blue: Call of the Ocean is a uniquely styled underwater exploration simulation game that offers a serene, immersive experience. With its slow pace and realistic depiction of ocean life, it invites players to discover the tranquility and mystery of the sea. For those who love the ocean, nature, or ecological themes—or simply seek a peaceful and restorative gaming experience—it represents a worthwhile and memorable diving journey. Would you also like a comparison with its predecessor or its later spiritual sequels on other platforms?